The data shown below were collected from the profiles of 175 X users who shared this research output. Click here to find out more about how the information was compiled.
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X Demographics
Mendeley readers
Attention Score in Context
| Title |
Ancient DNA reveals elephant birds and kiwi are sister taxa and clarifies ratite bird evolution
|
|---|---|
| Published in |
Science, May 2014
|
| DOI | 10.1126/science.1251981 |
| Pubmed ID | |
| Authors |
Kieren J Mitchell, Bastien Llamas, Julien Soubrier, Nicolas J Rawlence, Trevor H Worthy, Jamie Wood, Michael S Y Lee, Alan Cooper |
| Abstract |
The evolution of the ratite birds has been widely attributed to vicariant speciation, driven by the Cretaceous breakup of the supercontinent Gondwana. The early isolation of Africa and Madagascar implies that the ostrich and extinct Madagascan elephant birds (Aepyornithidae) should be the oldest ratite lineages. We sequenced the mitochondrial genomes of two elephant birds and performed phylogenetic analyses, which revealed that these birds are the closest relatives of the New Zealand kiwi and are distant from the basal ratite lineage of ostriches. This unexpected result strongly contradicts continental vicariance and instead supports flighted dispersal in all major ratite lineages. We suggest that convergence toward gigantism and flightlessness was facilitated by early Tertiary expansion into the diurnal herbivory niche after the extinction of the dinosaurs. |
X Demographics
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 17 | 10% |
| United Kingdom | 4 | 2% |
| Japan | 4 | 2% |
| Australia | 3 | 2% |
| Spain | 3 | 2% |
| Canada | 2 | 1% |
| Mexico | 2 | 1% |
| Bolivia, Plurinational State of | 1 | <1% |
| Costa Rica | 1 | <1% |
| Other | 7 | 4% |
| Unknown | 131 | 75% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 135 | 77% |
| Scientists | 35 | 20% |
| Science communicators (journalists, bloggers, editors) | 4 | 2% |
| Practitioners (doctors, other healthcare professionals) | 1 | <1% |
Mendeley readers
The data shown below were compiled from readership statistics for 470 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 7 | 1% |
| New Zealand | 6 | 1% |
| Brazil | 6 | 1% |
| Germany | 3 | <1% |
| United Kingdom | 2 | <1% |
| Chile | 2 | <1% |
| South Africa | 1 | <1% |
| Netherlands | 1 | <1% |
| Canada | 1 | <1% |
| Other | 2 | <1% |
| Unknown | 439 | 93% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Researcher | 95 | 20% |
| Student > Ph. D. Student | 79 | 17% |
| Student > Bachelor | 58 | 12% |
| Student > Master | 55 | 12% |
| Professor | 23 | 5% |
| Other | 81 | 17% |
| Unknown | 79 | 17% |
| Readers by discipline | Count | As % |
|---|---|---|
| Agricultural and Biological Sciences | 251 | 53% |
| Biochemistry, Genetics and Molecular Biology | 40 | 9% |
| Environmental Science | 29 | 6% |
| Earth and Planetary Sciences | 26 | 6% |
| Social Sciences | 4 | <1% |
| Other | 34 | 7% |
| Unknown | 86 | 18% |
Attention Score in Context
This research output has an Altmetric Attention Score of 467. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 11 July 2024.
All research outputs
#61,390
of 26,377,159 outputs
Outputs from Science
#2,291
of 83,958 outputs
Outputs of similar age
#410
of 241,029 outputs
Outputs of similar age from Science
#23
of 862 outputs
Altmetric has tracked 26,377,159 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 99th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 83,958 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 66.6. This one has done particularly well, scoring higher than 97% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 241,029 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 99% of its contemporaries.
We're also able to compare this research output to 862 others from the same source and published within six weeks on either side of this one. This one has done particularly well, scoring higher than 97% of its contemporaries.